Notes: Differences in stocks of American shad from the Columbia and Delaware rivers

Transactions of the American Fisheries Society
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Abstract

American shad Alosa sapidissima from the Columbia River on the Pacific coast and the Delaware River on the Atlantic coast were reared from 3 June to 24 October 1986 in two adjacent hypalon‐lined ponds. Although fish from the Columbia River were introduced into ponds 29 d after those from the Delaware River, they grew significantly faster and attained a greater final weight. Fish from the Columbia River also had lower mortalities at all test salinities and temperatures than fish from the Delaware River. Electrophoresis revealed allelic differences between the two stocks at one locus (creatine kinase). We conclude that the two stocks of American shad are sufficiently different so that managers should not introduce them to different river systems without careful consideration.

Suggested Citation

Rottiers, D.V., Redell, L.A., Booke, H., and Amaral, S., 1992, Notes: Differences in stocks of American shad from the Columbia and Delaware rivers: Transactions of the American Fisheries Society, v. 121, no. 1, p. 132-136, https://doi.org/10.1577/1548-8659(1992)121<0132:NDISOA>2.3.CO;2.

Publication type Article
Publication Subtype Journal Article
Title Notes: Differences in stocks of American shad from the Columbia and Delaware rivers
Series title Transactions of the American Fisheries Society
DOI 10.1577/1548-8659(1992)121<0132:NDISOA>2.3.CO;2
Volume 121
Issue 1
Year Published 1992
Language English
Publisher American Fisheries Society
Contributing office(s) Leetown Science Center
Description 5 p.
First page 132
Last page 136
Country United States
Other Geospatial Columbia River, Delaware River
Additional publication details